Projects requiring large resources do not require nation states either, that is what the concept of a corporation is for, to pool together resources. It's just a lot easier to waste money on something that costs more than it returns indefinitely with a nation state (so we, naturally see more large projects for vague things such as: "for the good of mankind, for everyone, ...", than we do in the commercial world), since a nation state's projects do not have to be sustainable (for real, not via propaganda) since you can always tax more.